Service Manual Cal. W339B - Seiko Digital Watch Module
Service manual for the Seiko Cal. W339B digital watch module, providing comprehensive technical documentation for technicians and authorized service centers. Details module specifications and dimensions (27.4mm diameter), display technology (nematic liquid crystal with 1/4 multiplex driving system), and full operational functions including time and calendar display, stopwatch with up to 30 hours of timing capacity, timer, 3-channel alarm system, and dual time display for different zones. Covers additional mechanisms such as sound demonstration, illuminating light feature, all-segments light-up capability, and hourly time signal. Provides battery specifications (SEIKO/SONY/MATSUSHITA CR2025, 3.0V with 5-year rated life), current consumption data (less than 4.0µA), and step-by-step procedures for module replacement and battery installation with button reset instructions. Includes technical notes on differences between Cal. W339A and Cal. W339B specifications and parts compatibility information essential for correct servicing and module interchangeability. Useful repair reference for workshop technicians working with Seiko quartz watch movements.
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Document Details
- Format
- Pages
- 1
- Size
- 55.8 KB
- Category
- Watchmaking